Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier

Journal Article · Wed Mar 15 00:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.034606· OSTI ID:20771353

Stefanini, A M; Behera, B R; Corradi, L; Fioretto, E; Gadea, A; Wu, Y W ^[1]; Scarlassara, F; Beghini, S; Montagnoli, G; Silvestri, R ^[2]; Trotta, M ^[3]; Szilner, S ^[4]; Zhang, H Q; Liu, Z H; Ruan, M; Yang, F ^[5]; Rowley, N ^[6]

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1. INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova) (Italy)
2. INFN and Dipartimento di Fisica, Universita di Padova, I-35131 Padova (Italy)
3. INFN, Sezione di Napoli, I-80126 Naples (Italy)
4. Ruder Boskovic Institute, HR-10002 Zagreb (Croatia)
5. China Institute of Atomic Energy, 102413 Beijing (China)
6. IReS, UMR7500, IN2P3-CNRS/Universite Louis Pasteur, Boite Postale28, F-67037 Strasbourg Cedex 2 (France)

Fusion-evaporation cross sections were measured in the two systems {sup 48}Ca+{sup 90,96}Zr in an energy range from well below to well above the Coulomb barrier. The sub-barrier fusion of {sup 48}Ca+{sup 90}Zr is reproduced by coupled-channels calculations including the lowest quadrupole and octupole vibrations of {sup 90}Zr, and using a Woods-Saxon potential with a standard diffuseness parameter a = 0.68 fm. However, the fusion cross sections are overestimated above the barrier. The low-energy slope of the excitation function for {sup 48}Ca+{sup 96}Zr is steeper. This implies a larger diffuseness parameter a = 0.85 fm. Fusion cross sections are well fit in the whole energy range, and the effect of the strong octupole vibration in {sup 96}Zr is predominant. The extracted fusion barrier distributions are reasonably well reproduced by calculations for both systems. A comparison with previous data for {sup 40}Ca+{sup 90,96}Zr is made in an attempt to clarify the role of transfer couplings in sub-barrier fusion.

• OSTI ID: 20771353
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 73, Issue 3; Other Information: DOI: 10.1103/PhysRevC.73.034606; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
CALCIUM 48
COMPARATIVE EVALUATIONS
COULOMB FIELD
COUPLED CHANNEL THEORY
DISTRIBUTION
EXCITATION FUNCTIONS
HEAVY ION FUSION REACTIONS
OCTUPOLES
QUADRUPOLES
WOODS-SAXON POTENTIAL
ZIRCONIUM 90
ZIRCONIUM 96